Can't see hard drive

Hey guys, I just got this macbook pro 15 inch with 2.4GHz and i5 processor, 320gb etc.

In the top right corner where it normally says Macintosh HD or HardDrive, there is nothing.

Didn't find it in the search toolbar eitheir. It was like this the minute I turned it on for the first time before messing with anything at all

Go to Finder on your task bar
Then Finder (top) -> Preferences -> check the box next to hard disks

Thank you!!